Neuroradiology
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Infections arising from free-living amebae are rare. They generally cause recognizable disease only in chronically ill, debilitated patients who are immune suppressed. Only about 70 cases of granulomatous amebic encephalitis have been reported. ⋯ CT demonstrated bilateral low-density areas with mild mass effect in the cortex and subcortical white matter, which showed increased signal on T2-weighted MRI. Craniotomy and brain biopsy revealed granulomatous encephalitis with acanthamoeba organisms. Though non-specific, imaging can support the diagnosis of amebic encephalitis and direct biopsy.